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Implementation Notes for All Dial Services
Figure 4-9 shows how X.25 is implemented over the D channel using PDN
service.
Router
X.25
terminal
ISDN
ET
ET
PH
X.25
terminal
X.25
PSPDN
Key
ET = Exchange terminator
PH = Packet handling
PSPDN = Packet switched
public data network
X.25 host (DTE)
DS0035A
Figure 4-9.
X.25 over the D Channel
Configuring X.25 Service over the D Channel
To configure X.25 service over the D channel, you enable the X.25 over the D
Channel parameter in the BRI Interface Configuration window. The parameter
enables this feature for each BRI line. You can configure multiple D channel
interfaces with X.25. Refer to Chapter 8 for configuration instructions.
Once you enable the X.25 feature, Site Manager prompts you to configure the
X.25 packet and service configuration.
Note: Site Manager modifies the ranges that you can set for certain packet and
service parameters to accommodate data over the D channel.
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